Morfeus17

Just wondering and maybe this question was posted before, can you run 5PSI on stock injectors, FPR, fuel pump, and 10:1 compression safely, assuming you stay below the 4-5 PSI threshold???

My next question is about the Vortech Universal FMU. To run 4-5 PSI, what configuration is neccessary, 10:1, 8:1, or 6:1???

turbomax97

iTrader: (6)

6:1 is good enough for the fmu

all of those stock parts are fine.... of course you need either the in line fuel pump or the in tank high flow pump

Bags

iTrader: (3)

Yes 4 PSI is the Limit on stock FPR and stock fuel pump.

And 8:1 on the fmu is a good one to have @5 psi , 6:1 will work @6+ psi

turbomax97

iTrader: (6)

And why would you lower fuel pressure for a higher psi?.....

Bags

iTrader: (3)

so you do not hit injector lock up

Morfeus17

Ok.. A couple of things to consider..... I have a Tial 38mm wastegate with a 5 pound spring configuration. This means my lowest boost setting is 5PSI. Accroding to you guys 4PSI is the limit on stock. So i guess I went pass the stock threshold.

As far as the Vortech Super Universal FMU, Vortech cliams their unit can regulate fuel pressure independently from the stock FPR. Would running this unit indepenently be better??? And since it is fully adjustable, I can set the fuel pressure in any increments. So, fuel pressure can be set to 5:1 if needed?


Since I'm using a 5 pound spring, will the fuel pump handle the boost requirements? I guess worse case senario, I'll by a 4psi spring instead.

Thanks for your response.